The people who made the game put in things where you would only hear or see them if you used cheats. If you activate cheats in any way in the game, you hear Raz's father (I think) Shout "YOU CHEATED!" there is dialogue you would never hear if you had not activated them for many other things as well.

That's a easter egg you notice if you took advandage of an actual glitch. There are little glitches hidden in alot of games as well as easter eggs and to do things in a specific order or press specific keys and difined times in the games unluck them so technicly you are unlocking part of the game, not cheating. when you down load a patch that upgrades everything for you and gives you all of the abilities thats cheating.